| | 2019-12-31 | 2020-12-31 | 2021-12-31 | 2022-12-31 | 2023-12-31 | 2024-09-30 |
| Amortization Cash Flow | | | 23900000.0 | 30900000.0 | 60500000.0 | |
| Amortization Of Intangibles | | | 23900000.0 | 30900000.0 | 60500000.0 | |
| Beginning Cash Position | | 1658600000.0 | 2835000000.0 | 2643300000.0 | 3151200000.0 | 3616300000.0 |
| Capital Expenditure | | -59800000.0 | -63700000.0 | -94500000.0 | -114400000.0 | -108900000.0 |
| Capital Expenditure Reported | | -59800000.0 | -63700000.0 | -94500000.0 | -114400000.0 | -108900000.0 |
| Cash Flow From Continuing Financing Activities | | 565300000.0 | 491900000.0 | 764600000.0 | 242000000.0 | -1170900000.0 |
| Cash Flow From Continuing Investing Activities | | 38800000.0 | -711100000.0 | -342500000.0 | -202800000.0 | -646000000.0 |
| Cash Flow From Continuing Operating Activities | | -30200000.0 | 48800000.0 | 132600000.0 | 219500000.0 | 290000000.0 |
| Cash From Discontinued Investing Activities | 0.0 | | | | | |
| Cash From Discontinued Operating Activities | 0.0 | | | | | |
| Change In Account Payable | | -1400000.0 | 9300000.0 | -200000.0 | 9300000.0 | 6700000.0 |
| Change In Accrued Expense | 0.0 | 0.0 | 400000.0 | 200000.0 | | |
| Change In Income Tax Payable | | -3700000.0 | 400000.0 | 7500000.0 | -4700000.0 | 6800000.0 |
| Change In Interest Payable | 0.0 | 0.0 | 400000.0 | 200000.0 | | |
| Change In Other Working Capital | | -137200000.0 | -3600000.0 | 1500000.0 | -59000000.0 | -80400000.0 |
| Change In Payable | | -5100000.0 | 9700000.0 | 7300000.0 | 4600000.0 | 13500000.0 |
| Change In Payables And Accrued Expense | | -5100000.0 | 9700000.0 | 7300000.0 | 4600000.0 | 13500000.0 |
| Change In Prepaid Assets | | -6800000.0 | -12300000.0 | -11400000.0 | -22100000.0 | -6500000.0 |
| Change In Receivables | | -12000000.0 | -34800000.0 | -39500000.0 | -48300000.0 | -12500000.0 |
| Change In Tax Payable | | -3700000.0 | 400000.0 | 7500000.0 | -4700000.0 | 6800000.0 |
| Change In Working Capital | | -161100000.0 | -41000000.0 | -42100000.0 | -124800000.0 | -85900000.0 |
| Changes In Cash | | 573900000.0 | -170400000.0 | 554700000.0 | 258700000.0 | -1526900000.0 |
| Common Stock Issuance | 0.0 | | | | | |
| Common Stock Payments | 0.0 | | | | | |
| Deferred Income Tax | | -7000000.0 | -38500000.0 | -1700000.0 | 4100000.0 | -37300000.0 |
| Deferred Tax | | -7000000.0 | -38500000.0 | -1700000.0 | 4100000.0 | -37300000.0 |
| Depreciation | | | 53600000.0 | 58100000.0 | 72000000.0 | |
| Depreciation Amortization Depletion | | 51800000.0 | 77500000.0 | 89000000.0 | 132500000.0 | 199900000.0 |
| Depreciation And Amortization | | 51800000.0 | 77500000.0 | 89000000.0 | 132500000.0 | 199900000.0 |
| Effect Of Exchange Rate Changes | | -4000000.0 | -21300000.0 | -46800000.0 | 11500000.0 | -11800000.0 |
| End Cash Position | | 2228500000.0 | 2643300000.0 | 3151200000.0 | 3421400000.0 | 2089400000.0 |
| Financing Cash Flow | | 565300000.0 | 491900000.0 | 764600000.0 | 242000000.0 | -1170900000.0 |
| Free Cash Flow | | -90000000.0 | -14900000.0 | 38100000.0 | 105100000.0 | 181100000.0 |
| Income Tax Paid Supplemental Data | | 4200000.0 | 33400000.0 | 17600000.0 | 43000000.0 | |
| Interest Paid Supplemental Data | | 26700000.0 | 19100000.0 | 30100000.0 | 52400000.0 | |
| Investing Cash Flow | | 38800000.0 | -711100000.0 | -342500000.0 | -202800000.0 | -646000000.0 |
| Issuance Of Capital Stock | 0.0 | | | | | |
| Issuance Of Debt | | 295000000.0 | 856800000.0 | 0.0 | 0.0 | 650000000.0 |
| Long Term Debt Issuance | | 0.0 | 856800000.0 | 0.0 | 0.0 | 650000000.0 |
| Long Term Debt Payments | | -10000000.0 | -302800000.0 | -8400000.0 | -7900000.0 | -648400000.0 |
| Net Business Purchase And Sale | | -58300000.0 | -409500000.0 | 0.0 | 0.0 | -173100000.0 |
| Net Common Stock Issuance | 0.0 | | | | | |
| Net Income From Continuing Operations | | -4000000.0 | -75400000.0 | -73400000.0 | 54800000.0 | 52900000.0 |
| Net Intangibles Purchase And Sale | -38900000.0 | -41700000.0 | | | | |
| Net Investment Purchase And Sale | | 156900000.0 | -275800000.0 | -248000000.0 | -87400000.0 | -364000000.0 |
| Net Issuance Payments Of Debt | | -10000000.0 | 554000000.0 | -8400000.0 | -7900000.0 | 1600000.0 |
| Net Long Term Debt Issuance | | -10000000.0 | 554000000.0 | -8400000.0 | -7900000.0 | 1600000.0 |
| Net Other Financing Charges | | 483600000.0 | -157500000.0 | 734600000.0 | 200900000.0 | -1174400000.0 |
| Net Other Investing Changes | | | 37900000.0 | | -1000000.0 | |
| Net PPEPurchase And Sale | -16300000.0 | -18100000.0 | | | | |
| Net Short Term Debt Issuance | 0.0 | 0.0 | 0.0 | 0.0 | | |
| Operating Cash Flow | | -30200000.0 | 48800000.0 | 132600000.0 | 219500000.0 | 290000000.0 |
| Operating Gains Losses | | 3300000.0 | -10300000.0 | 4800000.0 | 1100000.0 | 12100000.0 |
| Other Cash Adjustment Outside Changein Cash | 0.0 | 0.0 | | | | |
| Other Non Cash Items | | 19000000.0 | 21300000.0 | 9000000.0 | 9700000.0 | 5300000.0 |
| Pension And Employee Benefit Expense | | 3300000.0 | 8800000.0 | 4800000.0 | 1100000.0 | 7800000.0 |
| Proceeds From Stock Option Exercised | | 91700000.0 | 95400000.0 | 38400000.0 | 49000000.0 | 30700000.0 |
| Provisionand Write Offof Assets | | 2000000.0 | 1800000.0 | 2200000.0 | 5400000.0 | 5900000.0 |
| Purchase Of Business | | -58300000.0 | -409500000.0 | 0.0 | 0.0 | -173100000.0 |
| Purchase Of Intangibles | -38900000.0 | -41700000.0 | | | | |
| Purchase Of Investment | | -212400000.0 | -763800000.0 | -652800000.0 | -534900000.0 | -776100000.0 |
| Purchase Of PPE | -16300000.0 | -18100000.0 | | | | |
| Repayment Of Debt | | -305000000.0 | -302800000.0 | -8400000.0 | -7900000.0 | -648400000.0 |
| Repurchase Of Capital Stock | 0.0 | | | | | |
| Sale Of Investment | | 369300000.0 | 488000000.0 | 404800000.0 | 447500000.0 | 412100000.0 |
| Short Term Debt Issuance | 0.0 | 295000000.0 | 295000000.0 | 0.0 | | |
| Short Term Debt Payments | 0.0 | -295000000.0 | -295000000.0 | 0.0 | | |
| Stock Based Compensation | | 65800000.0 | 113400000.0 | 144800000.0 | 136700000.0 | 137100000.0 |
